Service t and cock.



H. MUELLER, DEGD. 0. B. a; A. MUELLER, nxnovwozs.

SERVICE T AND (JOCK.

APPLICATION FILED JULY 28, 1010.

Patented May 23,1911.

awe/Mow Jfe n r Mueller- UNITED srnrns rnntr OFFICE.

'HENRY MUELLER, 0E DECATUR, ILLINOIS; ORA B. MUELLER AND ADOLPHIJUELLER, EXECUTORS OE SAID HENRY MUELLER, DECEASED, ASSIGNORS TO H.MUELLER MANUFACTUEING COMPANY, OF DECATUR, ILLINOIS, A CORPORATION OFILLINOIS.

SERVICE T AND COCK.

Specification of Letters Patent.

Application filed July 28, 1910. Serial No. 574,395.

To all whom it may concern:

Be itknown that I, HENRY MUELLER, a citizen of the United States,residing at Decatur, in the county of Macon and State of Illinois, haveinvented new and useful Improvements in Service TS and Cocks, ofWhichthe following is a specification.

My invention relates to valves of the type commonly called cocks, and isespecially directed to those of that type commonly known as service teesand cooks. These service tees and cocks are very much used in makingconnections to gas mains. While es pecially adapted for use inconnection with thisspecific type of main, and forvuse in the specifiedsituations, the valve of my inven- .'tion is capable of use inconnection with other types of mains and in other situations.

An important object of my invention is to provide in a three-branchcasing having a plug seated in one of the chambers or branches, a novelarrangement of a packing which is adapted to exteriorly engage the lipof one branch of the casing, and means removably mounted on said plugwhich is designed to compress the packing against the exterior wall ofthe casing in which it is positioned.

Another feature which I provide consists of a removable stop; this stopis adapted to retard the operative movement of the valve plug when it isunseated. While I am aware that this feature is not new in a valvedevice, yet its position in a three-branch casing has not beencommensurate with the facility that I attain in my device. I provide aform of plug which has a finely screw threaded"pr6firfiding head, thecasing in which it is positioned being correspondingly threaded tosnugly embrace the head, and the casing carries a screw which projectsinlcriorlytlwreof adjacent its screw threaded portion, and the plughead. lies normally adjacent thisscrew.

The advantage of my arrangement will be obvious from the descriptionhereinafter to follow.

l. have aimed in my invention to produce an et'licicnt and durableservice tee and cock which is not expensive to manufacture,

in the accompanying drawings, I show one embodiment of'iny invention.

The single figure of the drawin is a central longitudinal section of thevajve of my invention.

10 designates the casing generally. This casing is a three-branchcasing, the several branches being designated 11, 12 and 13 re-,spectively. The branches 11 and 13 are in line with each other, whilethe branch 12 makes an acute angle with the other two branches.

14 is the valve seat which separates branch 11 from the branches 12 and13. This seat is at'right angles to the branch 12, and therefore makesthe same acute angle with the branches 11 and 13 as does the branch 12.-

The valve disk 15 cooperates with this seat to shut on the branch 11from the other two branches. This valve disk 15 is mounted on a stem 16which extends without the casing through the branch 12. This stem isprovided with a much enlarged portion 17 screw-threaded directly intothe branch 12. In order to lighten the valve to save in the cost of itsmanufacture, this enlarged poi--- tion is cored out, as indicated indotted lines, from its outside end. The relative sizes of the enlargedportion 17 and the valve disk 15 are such that the valve disk 15 mayreadily be removed with the stem by simply unscrewing the same from thebranch 12. The outer end of the stem is formed as a nut 18 for operatingthe valve by a wrench.

Between the outer end of the branch 12 of the casing and thescrew-threaded enlarged portion of the stem is located a packing 19 in aconical packing recess 2(),formed by reaming out the outer end of thebranch 12.

A gland 21screw-threaded on the enlarged scrmv-threadcd portioil ot' thcstemscrves to clamp this packing 19 in place and upon the stem so as tomake a tight joint. The outer end of this gland may be formed as a nutfor convenience in adjustment in the same manner as the outer end of thestem is formed.

In order to limit the movement of the 'alve disk from its seat a screw22 is threaded into the casing, the length of the screw being such thatits inner end may project within the casing and. between the valve diskand the enlarged portion of the stem. Prcf crably the head of the screwmakes a fluid tight joint with the casing as shown, the.

length of the-screw being such as to permit this Without interference.

It should now be evident that this embodiment of'my invention is at oncesimple, eiiicienhdurable and cheap to manufacture It is simple becauseit is made up of few parts easy of; manipulation. It is durable becausethe parts can be made oithe desired materials to secure the greatestdurability and because its design allows the best proport-ioning of theparts. "It is efiicient because of the fact that a fluid tight fittingof the valve is most readily secured, because the fine screw-threads onthe enlarged portion make it possible by the application of a wrench tosecure as great a pressure as desired upon the valve seat by the disk,and because when the valve is open there is no leakage between the stemand the branch through which the stem passes, for after-the valve isopenthe gland 21 may be tightly screwed home to force the packinginto-place around the stem to make a fluid tight joint. The removablestop 22 prevents the entire removal of the stem from the casing throughaccident or carelessness when opening the valve- This is a veryimportant feature, for

I after connections have been made to the gas mains, and the system fromthe service tee has been completed, it is desired that the cock beopened and remain open. If it is open \too far, leakage may result dueto engage-- ment of too. few screw threads with the branch of thecasing, or it may be that a careless workman will remove it altogether,and allowa considerable quantity of gas to escape before he replaces thesame. The stop accuratbly positions the valve when it is opened. Thestop, of course, does not interfere with-the assembly and disassembly ofthe valve for the same maybe readily removed.

I desire to cover in the annexed claims my invention as embodied in alltypes of valves inwhich it may be embodied without departing from itsgeneric spirit, and in all situations inwhich it may be used.

What I claim is:

1. In a valve, a three branch casing, a valve seat which divides onebranch from the other two, a valve disk and stem cooperating with saidseat, said'stem projecting from said casing through oneof said other twobranches, and having a much enlarged portion screw-threaded directly,into said branch, a packing surrounding said screw threaded portion andexteriorly' abutting against the mouth of said casing, and meansremovably carried by said screw threaded portion adapted to compresssaid packing against said mouth.

2. In a valve, a three-branched casing, a valve seat which divides onebranch from the other two, a valve disk and stem conication'between theothers, said plug comceases operating with said seat, said stem project-I ing from said casing through one of said other two branches, andhaving a much enlarged head screw-threaded directly into said branch,said last named branch having a flared mouth forming an exterior lip andan interior cone-shaped recess adjacent said screw threaded head, apacking seated in said recess and surrounding said head, and.meansmovably mounted on said head adapted to compress said packingwithin said recess, the movement thereof being limited by the casinglip, substantially as described.

3. In a valve having a three-branched casing and a valve seat whichdivides one branch from the other two, the combination of: a valve diskand stem cooperating with said seat, said stem projecting from saidcasing through one of said other two branches and having a much enlargedhead screw-threaded into said branch, a packing surrounding said screwthreaded head andexteriorly abutting against said casing and a. glandscrew threaded to said head adapted to compress said packing against themouth of said casing. 7

4c. In a valve a three-branch casin a valve seat which divides onebranch t rom the other two, a valve disk and stem cofipcrating with saidseat, said stem projecting from said casing through one of said othertwo branches and having amuch enlarged portion screw-threaded directlyinto the said branch, a, removable stop projecting from the casingandbetween the valve disk and the. enlarged portion of the stem, a packingsurrounding said screw threaded head and exteriorly abutting againstsaid casing and a gland screw threaded to said head adapted to compresssaid packing against the mouth of said casing.

5. A service tee comprising two branches in line with each other and oneat an acute angle with the other two, a valve seat between the first twomentioned branches, a valve stem in the other branch, a disk on the stemcoiipcrating with the seat, said stein havingan enlarged cored out headscrewthreaded directly into the end of the branch, a stop projectingfrom the casing and be- 1 tween the valve disk and the enlarged portionof the stem, said last named branch having a flared mouth forming anexterior lip. and an interior cone-shaped recess. adjacent said screwthreaded head, a packing seated 1 in said recess and surrounding saidhead, and means movably mounted on said head ada ted to compress saidpacking within sai recess, the movement thereofbeing limited by thecasing lip.

6, A valve device comprising a threechambered casing, two of saidchambers sub stantially in alinement, a'plug positioned'in the thirdchamber adapted to close commuprising a stem, a seating disk at one endof said stem and an integral enlarged screw threaded head at the other,said third chamher being correspondingly screw threaded to embrace saidplug, the mouth of said chamber formed adjacentsaid head 'with aninclined wall, beyond which said head pro trudes when the said disk isseated, a pack-- ing embracing said screw threaded head and abuttingagainst the said inclined wall, and means removably carried by theprotrudin end of said head adapted to compress sai packing against theinclined wall aforementioned.

7. A Valve device comprising a three chambered casing, two of saidchambers substantiall in alinement, a plug positioned in the thirdchamber and adapted to close communication between the others, said plugcomprising a stem, a seat-111g disk at one'end of said stem, and anenlarged screw threaded head at the other, said thlrd chamber beingcorrespondingly screw threaded toembrace said plug head, and having anadjustable interior stop adjacent its threaded )ortion, the mouth ofsaid chamber. formed adjacent said head with an inclined wall, beyondwhich said head protrudes when the said disk is v HENRY MUELLER.

Witnesses:

W. R. GUs'rIN, WILLIAM R. BIDDLE.

